feae4e0438
811067ca1cbbd4a697791cbe3ecd4bee19fe6193 test: add coverage for snapshot chainstate not matching AssumeUTXO parameters (pablomartin4btc) 4a5be10b928d4ed33d223972537c1cb79163e79c assumeutxo, blockstorage: prevent core dump on invalid hash (pablomartin4btc) Pull request description: While reviewing #27596 (ran `loadtxoutset` in `mainnet` before `m_assumeutxo_data` is empty as [currently](434495a8c1/src/kernel/chainparams.cpp (L175-L177)) in master - back to 1b1d711), got a `core dumped`, so it seems there's a potential issue if new releases ever remove snapshot details or a semi-experienced user performs a `loadtxoutset` on a different "customised" binary version (not sure if this is a real use case). ``` 2023-10-18T17:42:52Z [init] Using obfuscation key for /tmp/.test_utxo_2/blocks/index: 0000000000000000 node/blockstorage.cpp:390 LoadBlockIndex: Assertion `GetParams().AssumeutxoForBlockhash(*snapshot_blockhash)' failed. Aborted (core dumped) ``` <details> <summary>This is also happening before IBD is completed (<code>background validation</code> still being performed as it can be seen in rpc <code>getchainstates</code>)</summary> ``` /src/bitcoin-cli -datadir=${AU_DATADIR} getchainstates { "headers": 813097, "chainstates": [ { "blocks": 368249, "bestblockhash": "00000000000000000b7a08224a1cb00d337100ba7a46c03d04b2c2d8964efc37", "difficulty": 52278304845.59168, "verificationprogress": 0.086288278873286, "coins_db_cache_bytes": 7969177, "coins_tip_cache_bytes": 14908338995, "validated": true }, { "blocks": 813097, "bestblockhash": "0000000000000000000270c9fdce7b17db64cca91f90106964b58e33a4d91089", "difficulty": 61030681983175.59, "verificationprogress": 0.999997140098457, "coins_db_cache_bytes": 419430, "coins_tip_cache_bytes": 784649420, "snapshot_blockhash": "00000000000000000002a7c4c1e48d76c5a37902165a270156b7a8d72728a054", "validated": false } ] } ``` </details> <details> <summary>Steps to reproduce the core dump error and its output:</summary> 1. Perform a `loadtxoutset` in `mainnet` on compiled `bitcoind` adding the block hash from Sjors's [commit](24deb2022b). 2. Once step 1 finishes, remove the added code from step 1 and compile again or just compile `master` without any changes on top. 3. Run `bitcoind`, soon it'll crash with: ``` 2023-10-18T17:42:52Z [init] init message: Loading block index… 2023-10-18T17:42:52Z [init] Assuming ancestors of block 00000000000000000001a0a448d6cf2546b06801389cc030b2b18c6491266815 have valid signatures. 2023-10-18T17:42:52Z [init] Setting nMinimumChainWork=000000000000000000000000000000000000000052b2559353df4117b7348b64 2023-10-18T17:42:52Z [init] Prune configured to target 3000 MiB on disk for block and undo files. 2023-10-18T17:42:52Z [init] [snapshot] detected active snapshot chainstate (/tmp/.test_utxo_2/chainstate_snapshot) - loading 2023-10-18T17:42:52Z [init] [snapshot] switching active chainstate to Chainstate [snapshot] @ height -1 (null) 2023-10-18T17:42:52Z [init] Opening LevelDB in /tmp/.test_utxo_2/blocks/index 2023-10-18T17:42:52Z [init] Opened LevelDB successfully 2023-10-18T17:42:52Z [init] Using obfuscation key for /tmp/.test_utxo_2/blocks/index: 0000000000000000 node/blockstorage.cpp:390 LoadBlockIndex: Assertion `GetParams().AssumeutxoForBlockhash(*snapshot_blockhash)' failed. Aborted (core dumped) ``` </details> <details> <summary>After original change, error message output:</summary> ``` 2023-10-20T15:49:12Z [init] init message: Loading block index… 2023-10-20T15:49:12Z [init] Assuming ancestors of block 00000000000000000001a0a448d6cf2546b06801389cc030b2b18c6491266815 have valid signatures. 2023-10-20T15:49:12Z [init] Setting nMinimumChainWork=000000000000000000000000000000000000000052b2559353df4117b7348b64 2023-10-20T15:49:12Z [init] Prune configured to target 3000 MiB on disk for block and undo files. 2023-10-20T15:49:12Z [init] [snapshot] detected active snapshot chainstate (/tmp/.test_utxo_2/chainstate_snapshot) - loading 2023-10-20T15:49:12Z [init] [snapshot] switching active chainstate to Chainstate [snapshot] @ height -1 (null) 2023-10-20T15:49:12Z [init] Opening LevelDB in /tmp/.test_utxo_2/blocks/index 2023-10-20T15:49:12Z [init] Opened LevelDB successfully 2023-10-20T15:49:12Z [init] Using obfuscation key for /tmp/.test_utxo_2/blocks/index: 0000000000000000 2023-10-20T15:49:13Z [init] *** Assumeutxo data not found for the given blockhash '00000000000000000002a7c4c1e48d76c5a37902165a270156b7a8d72728a054'. 2023-10-20T15:49:13Z [init] Error: Assumeutxo data not found for the given blockhash '00000000000000000002a7c4c1e48d76c5a37902165a270156b7a8d72728a054'. Error: Assumeutxo data not found for the given blockhash '00000000000000000002a7c4c1e48d76c5a37902165a270156b7a8d72728a054'. 2023-10-20T15:49:13Z [init] Shutdown requested. Exiting. 2023-10-20T15:49:13Z [init] Shutdown: In progress... 2023-10-20T15:49:13Z [scheduler] scheduler thread exit 2023-10-20T15:49:13Z [shutoff] Flushed fee estimates to fee_estimates.dat. 2023-10-20T15:49:13Z [shutoff] Shutdown: done ``` </details> <details> <summary>Alternative on error handling using <code>return error()</code> instead of <code>return FatalError()</code> used in this PR, which produces a different output and perhaps confusing:</summary> ``` 2023-10-20T21:45:58Z [init] Using obfuscation key for /tmp/.test_utxo_2/blocks/index: 0000000000000000 2023-10-20T21:45:59Z [init] ERROR: Assumeutxo data not found for the given blockhash '00000000000000000002a7c4c1e48d76c5a37902165a270156b7a8d72728a054'. 2023-10-20T21:45:59Z [init] : Error loading block database. Please restart with -reindex or -reindex-chainstate to recover. : Error loading block database. Please restart with -reindex or -reindex-chainstate to recover. 2023-10-20T21:45:59Z [init] Aborted block database rebuild. Exiting. 2023-10-20T21:45:59Z [init] Shutdown: In progress... 2023-10-20T21:45:59Z [scheduler] scheduler thread exit 2023-10-20T21:45:59Z [shutoff] Flushed fee estimates to fee_estimates.dat. 2023-10-20T21:45:59Z [shutoff] Shutdown: done ``` </details> <details> <summary>Current state (including ryanofsky <a href="https://github.com/bitcoin/bitcoin/pull/28698#discussion_r1368635965">suggestion</a>), after code change, error message output:</summary> ``` 2023-10-25T02:29:57Z [init] Using obfuscation key for /home/pablo/.test_utxo_2/regtest/blocks/index: 0000000000000000 2023-10-25T02:29:57Z [init] *** Assumeutxo data not found for the given blockhash 'f09b5835f3f8b39481f2af3257bbc2e82845552d4d2d6d31cf520fc24263ed5b'. 2023-10-25T02:29:57Z [init] Error: A fatal internal error occurred, see debug.log for details Error: A fatal internal error occurred, see debug.log for details 2023-10-25T02:29:57Z [init] Shutdown requested. Exiting. 2023-10-25T02:29:57Z [init] Shutdown: In progress... 2023-10-25T02:29:57Z [scheduler] scheduler thread exit 2023-10-25T02:29:57Z [shutoff] Flushed fee estimates to fee_estimates.dat. 2023-10-25T02:29:57Z [shutoff] Shutdown: done ``` </details> ACKs for top commit: naumenkogs: ACK 811067ca1cbbd4a697791cbe3ecd4bee19fe6193 theStack: ACK 811067ca1cbbd4a697791cbe3ecd4bee19fe6193 ryanofsky: Code review ACK 811067ca1cbbd4a697791cbe3ecd4bee19fe6193. Tree-SHA512: cfc137b0a4f638b99fd7dac2c35cc729ef71ae1166a2a8960a91055ec90841cb33aed589834012cfe0e157937e2a76a88d1020ea1df2bc98e1114eb1fc8eaae4
Bitcoin Core integration/staging tree
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